Just an FYI, some E-Cigs have a small chance of exploding if over charged with the wrong voltage charger. Saw an article where one exploded and sent a guy to the hospital with serious burns on his hands, face and chest and put him into a coma.

Also, I am unsure of how regulated the liquids in these things are, so be very cautious when buying them. Some news sources say that because some go unregulated, they could potentially be more dangerous than smoking conventional cigarettes.

Of course, I read that news article quite a few months ago and regulating the liquids could very well have changed for the better by now.